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Free checksum calculator with CRC32, MD5, SHA-1, SHA-256, SHA-384, SHA-512 support. Verify file integrity, detect corruption, and ensure download authenticity instantly.
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Enter text or upload a file to calculate checksums
📦 File-Focused Checksum Verification
🔄 Different Tools for Different Needs:
Best for: Error detection in ZIP files, network transfers, and storage systems
Fast 32-bit algorithm designed for detecting accidental data corruption. Not suitable for security purposes.
Best for: Legacy systems only (deprecated for security)
128-bit hash function. Once popular but now considered cryptographically broken. Use SHA-256 instead.
Best for: Git commits (deprecated for security)
160-bit hash function. Deprecated by NIST in 2011 due to collision vulnerabilities.
Best for: Secure file verification and downloads
256-bit hash from SHA-2 family. Current industry standard for cryptographic file verification.
Best for: High-security applications
384-bit hash offering enhanced security for sensitive data and compliance requirements.
Best for: Maximum security requirements
512-bit hash providing the highest level of collision resistance for critical applications.
Verify that downloaded software, operating systems, or applications haven't been corrupted or tampered with during download.
Ensure files transferred via FTP, cloud storage, or email arrive intact without corruption.
Confirm backup files match original files and haven't been corrupted during the backup process.
Detect unauthorized modifications to system files, configuration files, or sensitive documents.
Verify Linux distributions, Windows ISOs, and other disk images before burning or installation.
Check ZIP, RAR, and other compressed archives for corruption using CRC32 checksums.
Generate hashes with HMAC support for text and passwords
Compare two hashes to verify they match
Generate secure password hashes with bcrypt and salt
Encode and decode Base64 strings and files
Encode and decode URL parameters safely
Decode and verify JSON Web Tokens
Unlike most competitors, we include CRC32 for ZIP file and network transfer verification
Calculate all checksums simultaneously - no need to run multiple times
Auto-match feature compares your checksum against all calculated hashes
Your files never leave your browser - complete privacy and security
Process files of any size - competitors often limit to 100MB or less
Save all checksums to a text file for documentation and records
For more information about checksum algorithms and file integrity verification, refer to these authoritative sources: